Automatic electromagnetic sanding-gear for use on electric railways and tramways, &amp;c.



PATBMED AUG. 14, 190e.

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AUTOMATIC BLEGTROMGNETIG SANQING GEAR PQR USE im grimms RAILWAYS AHBTAMWAYS, 5w.

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CHARLES W. CROSBIE, OF SANDHILL ROARKEE, lNDlA. AND ARTHUR WARD, OFMACCLESFELD, ENGLAND,

ASSIGNORS TO MARK GUM MINS, F MANCHESTER, ENGLAND. AUTOMATlCELECTROMAGNETlC SANDlNG-GAR FOR USE ON LECTRH; RMLWAYS AND TRAMWYS, Bic.

Patented Aug. 14, 1906.

Application {iled April 3| 1905. Serial No. 253,646.

To all whom, it may concern:

Be it known that-we, CHARLES WILSON Cnossrn, residing at SandhillRoarkce, in the Northwest Provinces, India, and ARTHUR WARD, `residingat Springield, Beech Lane, Macclesfield, in the county of Chester,England, subjects of the King ol Great Britain and ireland, haveinvented new and useful automatic electromagnetic sanding-gear for useon electric railways and tramways operated instantaneously with theelectric brake from the controller-handle, of which the following is aspecification.

This invention relates to a combination with the sand-valves orsanding-gear as at present in use on electric tramways and rail- Ways ofa magnetic device that may be either an electromagnet or other devicethat Will exercise a magnetic pull when energized by an electriccurrent.

The object of the said invention is to automatically operate thesand-gear by utilizing the current generated by the rnotors when actinas generators to energize a solenoid or ot ier magnetic: device attachedto the sand-gear when the Inotorinan in cases of emergency applies themagnetic, rheostatic, or other types of electric brakes, and therebyminimize the risk of accident by sanding the track instantaneously withthe application of the electric or magnetic brakes if the motorrnan,owing to excitement or other causes, neglects to open the sand-valves inthe ordinary manner 'by the application of the foot to the leversconnected therewith.

ln the accompanying drawing one method of application of the saidinvention is illustrated as applied to a tram-car; but we do not confineourselves to the precise method shown, as the connections and desi n ofthe magnetic device may be varied wit out departing from the nature ofour invention.

o is the sand-box.

t is a lever on the rocking shaft, the valve or slide c being connectedto one end of said lever and the opposite end of the lever b connestedto the bell-crank lever d by the rod c.

f is the pin, which the motorrnan presses down with his foot when therails require to he sanded on ordinary occasions.

According to and for the purpose of our invention We connect a solenoidor the armature of an electromagnet, such as g, to the lever t by ineensof a slotted link, as j, so as not to affect the ordinary action oi thesanding-gear. VWe connect the solenoid or other magnetic device to themotor and controller Wiring, so that the current of the motors whenWorking as generators will flow through its windings,l the pull of thedevice increasing in proportion to the current generated. Said solenoidor other electromagnetic device is supported in close proirirnittT tothe valve or gear of the sanddioxes, and when the inagnet g is energizedby the current from the motors acting as generators it draws or pullsthe armature lc to said magnet g, which opens the valve a and allows thesand to fall from the sandboxes through the pipes to the track. One ormore tension-springs, such as l, can be attached to the valves of thesand-boxes or the lever t, as shown, by which said valve is caused toclose immediately the current is switched off by the controller-handle mbeing moved round to the off position or by the car coming to a stop,when current will not then be generated by the motors. By ineens oflthese tensionfsprings the pull of the device can also be re ulated, sothat the valves will open at any esired amount of current beforeskidding would take place. A sand box or boxes, a controller, and asolenoid or other electromagnetic device in connection therewith arelitted at each end oi" the car; but the solenoid or electromagneticdevice is only actuated on the same end of the car as the controlleroperated, which would be the one on the end of the car that would be theiront end when runningr in regular service.

Bv these means the magnetic brake or the rheostatic brake (which isoperating the motors as generators through rsistances) is able toproduce not onlT a strong retarding eiect on the motor-armatures, andconsequently to the car-wheels through gears, but also at the same timeprovides increased friction between the car-Wheels and the rails,tlnireoj,y minimizing or preventing slridding, thus bringing the car orvehicle to rest in the shortest possible distance. The combination ofcontrollers used on electric cars for connecting motors in anch a wav asto propel the cars and by throwing the handle in the other direction,connecting them so that they become generators to retard the cars, is soIOC IOS

Well known that explanation is not consid ered necessary.

We claim as our invention- 1. Electromagnetic sanding-gear for use onelectric railways, comprising a solenoid connected with the motor andcontroller Wiring, and means connected therewith for opening thesand-Valve When the motors are used as generators7 in combination withmeans for operating said sanding-gear independent oiI the solenoid,

2. Electromagnetic sanding-gear for use on electric railways, comprisinga solenoid connected with the inotor and controller Wiring, meansconnected therewith for opening the sand-Valve When said inotors act asgenerators for applying the sand direct to the Wheels and rails, saidvalve adapted to be ke t open until the car stops.

n testi1nonT whereof We have signed our names to this speciiication inthe presence of tWo subscribing Witnesses.

CHARLES NV. CRCSBIE. ARTHUR WARD. Witnesses to the signature of CharlesWilson Crosbie:

JN0. HUGHES, J. ERNEsT HUGHES. Witnesses to the signature of ArthurWARD:

JOHN BROWN, WILLIAM S. FRANCE.

